Material - Stainless Steel / Die Cast Metal / Plastic / Wooden BaseThis watch case back removing bench tool is a must for any serious horologist enthusiast. It has 6 pairs of various sizes back opening bits. It also comes with 6 opening parts of different sizes for Rolex cases and the adaption tool part. This adaption tool can be used for other brands of watch case openers. Along with 4 pairs of watch case vice parts of various shapes and sizes. These are made of plastic to stop the tool from scratching the case.